RBS,

I actually got the idea from Peter T. in his response to your post on
"Biggest Commercial xla File," so thanks. I'm still interested to know if
there are any risks, but if I don't hear anything back to this post I'll
just try it and find out for myself.

Doug

"RB Smissaert" wrote in message
...
Didn't know you could do that, but it seems to works fine
with a different extension!

RBS

"Doug Glancy" wrote in message
...
I've made some workbook-specific addins. I distribute them to other
users
besides myself.

I'd like to change the extensions on these addins from "xla" to another
three-letter extension. I'd like to know if this will cause any
problems
in Windows or Excel. I'm not talking about coding issues, but just
wondering if changing the extensions could cause the addins not to work
as
well as if I kept the default extension.

These addins are running on XL 2000 on up.

Thanks,

Doug